add security best practicies

[ktalebian]

Contributing to Twilio

All third-party contributors acknowledge that any contributions they provide will be made under the same open-source license that the open-source project is provided under.

• I acknowledge that all my contributions will be made under the project's license.

[riksingh]

Should we also be explaining the downside risk--- i.e., the parallel mcp server could get access to your twilio data? I just worry that people won't realize the downside can be extreme